Prime Minister Gordon Brown warned that security will have to be stepped up in preparation for potential terrorist attacks.

Users of major rail stations, shopping centres and football stadiums face tougher restrictions on movement under plans announced by the Prime Minister to beef up security in busy places.

Assessments for security upgrades will start with the nation's 250 busiest rail terminals - including Oxford, and Didcot Parkway.

The move follows June's attempts to attack a crowded London street and an airport terminal in Glasgow.